Explain the Job OutputFormat?
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What is structured data?
What is Partioner in hadoop? Where does it run
Explain how do ‘map’ and ‘reduce’ works?
What is the jobtracker?
What is the function of ApplicationMaster?
What do sorting do?
How you can contact your client everyday ?
Can we do online transactions(oltp) using hadoop?
How hdfa differs with nfs?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
What is the communication channel between client and namenode/datanode?
How many Daemon processes run on a Hadoop system?
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